js a small example of calibration register
Posted on 2009-06-16 filed under: AJAX (RSS) 60 views
<head>
<script language="Javascript">
function checkUserName (ssn) (
if (ssn.length <3 | | ssn.length> 18) (
/ / alert ( "\ Please enter the correct user name, user name, a length of 3-18 bit!")
document.getElementById ( "usernameErr"). innerHTML = "<font color='red'> Please enter the correct user name, user name, a length of 3-18 bit! </ font>";
document.getElementById ( "usernameErr"). focus ()
return false;
)
document.getElementById ( "usernameErr"). innerHTML = "";
return true;
)
</ script>
</ head>
<body>
<form method="post">
<input type="text" name="username"> <span> </ span>
<input type="submit">
</ form>
</ body>
</ html>
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To do their own thing, that is, a simple effect, have done before, then forget that they are also a few days, the help of classmates at the finish
Tags: lt (RSS), quot (RSS), script language (RSS), span (RSS), innerhtml (RSS), input type (RSS), classmates (RSS), few days (RSS), ssn (RSS), calibration (RSS)
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